Wuzak changed his name to Armand and his nationality from Australian to Danish. Donkeys were an important means of transport in any war since they had been tamed, also in WWII:

Scaring enemy donkeys to make them balk could have been a new tactical task for the Ar 231. If a pink paint (only for the bottom side, for reasons of camouflage) would enforce the effect had to be found out by trials.